diff options
Diffstat (limited to 'module/zfs/multilist.c')
| -rw-r--r-- | module/zfs/multilist.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/module/zfs/multilist.c b/module/zfs/multilist.c index a3adfd317af6..36c0d33bf1f6 100644 --- a/module/zfs/multilist.c +++ b/module/zfs/multilist.c @@ -96,9 +96,12 @@ multilist_create_impl(size_t size, size_t offset, } /* - * Allocate a new multilist, using the default number of sublists - * (the number of CPUs, or at least 4, or the tunable - * zfs_multilist_num_sublists). + * Allocate a new multilist, using the default number of sublists (the number + * of CPUs, or at least 4, or the tunable zfs_multilist_num_sublists). Note + * that the multilists do not expand if more CPUs are hot-added. In that case, + * we will have less fanout than boot_ncpus, but we don't want to always + * reserve the RAM necessary to create the extra slots for additional CPUs up + * front, and dynamically adding them is a complex task. */ multilist_t * multilist_create(size_t size, size_t offset, |